I will not give her the new salary until the renewal stated in the green contract..
If she cares about this job...she will work hard..otherwise, she will argue with you more..
I used to tell the maids, if they can renew the contract with me (w/o me firing them), I will pay them the agency fee which I save from hiring new maid (on regularly basis when the new contract starts..of course I will not promise).
but they want quick and easy money only (lazy and bad attitude).
Nowadays, it is hard to find a good maid...if they argue with you now..they will fight for permanent stay later ...ha ha.